Floor prep problems

[Flintstone]

 

[Rich Midge]

My method is slightly different. I carry the backerboards over the transition, glued and screwed into the solid floor and the timber. SLC the solid up to the height of the backerboards then decouple over the lot.

 

[Flintstone]

My method is slightly different. I carry the backerboards over the transition, glued and screwed into the solid floor and the timber. SLC the solid up to the height of the backerboards then decouple over the lot.

That's basically what I did but no un coupling.
I once did one and just uncoupled the joint, about 1m wide

 

[Mapei UK Marketing]

Hi all,

Hopefully this is in time for the project mentioned if not hopefully it will be good reference for future projects. Our Technical Services Team recommend the following...

Overlay the floorboards with an appropriate board system such as minimum 15mm exterior grade plywood screwed at a maximum of 300mm centres or tile backer boards. We would advise speaking to the board manufacturer to ensure a suitable system is used.

When tiling in an area that consists of different substrates, such as timber & concrete, a movement joint must be mirrored through to the tiled finish. This will allow for any stresses and or potential movement which can occur between the different substrates. To infill the joint we would suggest using Mapei Mapesil AC for ceramic or porcelain and Mapei Mapesil LM for natural stone.

If you require further assistance please contact Mapei Technical on 0121 508 6970. Option 2.

Hope that helps!